import React from "react";
import { useNavigate } from "react-router-dom";

export default function Header() {
  const navigate = useNavigate();
  function back() {
    navigate(-1);
  }
  function forward() {
    navigate(1);
  }
  return (
    <>
      <h2>React Router Demo</h2>;<button onClick={back}>后退</button>
      <button onClick={forward}>前进</button>
    </>
  );
}
